A tab (component) is a Coveo JavaScript Search Framework component which the end user can select to access a specific section of a search interface. Among other things, selecting a tab may toggle the visibility of certain elements in the search page, and/or enforce a constant query expression so that queries made from that tab only target a particular subset of items. Coveo Machine Learning models need to be informed of tab selections to provide contextually relevant output (see tab (parameter) and originLevel2).